package demo3;


import java.util.Arrays;
import java.util.Comparator;

class Student
{
    public String name;
    public int age;
    public int score;

    public Student(String name, int age, int score) {
        this.name = name;
        this.age = age;
        this.score = score;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", score=" + score +
                '}';
    }
}

class Agecomparator implements Comparator<Student>
{

    @Override
    public int compare(Student o1, Student o2) {
        return o1.age-o2.age;
    }
}

class Scorecomparator implements Comparator<Student>
{

    @Override
    public int compare(Student o1, Student o2) {
        return o1.score-o2.score;
    }
}

class Namecomparator implements Comparator<Student>
{

    @Override
    public int compare(Student o1, Student o2) {
        return o1.name.compareTo(o2.name);
    }
}
public class test {
    public static void main(String[] args) {
        Student[] students=new Student[3];
        students[0]=new Student("zhangsan",10,10);
        students[1]=new Student("lisi",20,20);
        students[2]=new Student("wangwu",30,30);


        Agecomparator getcomparator=new Agecomparator();
        Arrays.sort(students,getcomparator);
        System.out.println(Arrays.toString(students));
        System.out.println("===========");
       Scorecomparator scorecomparator=new Scorecomparator();
        Arrays.sort(students,scorecomparator);
        System.out.println(Arrays.toString(students));
        System.out.println("===============");
        Namecomparator namecomparator=new Namecomparator();
        Arrays.sort(students,namecomparator);
        System.out.println(Arrays.toString(students));
    }
}

